杂草稻密度对栽培稻生长发育和产量的影响  

Effects of Weedy Rice Density on Growth Characteristics and Yield of the Rice

作　　者：宋冬明[1] 马殿荣[1] 杨庆[1] 陈温福[1] 

机构地区：[1]沈阳农业大学水稻研究所,辽宁省北方粳稻育种重点实验室,沈阳110161

出　　处：《沈阳农业大学学报》2008年第3期270-273,共4页Journal of Shenyang Agricultural University

基　　金：国家自然科学基金项目(30671262);教育部高等学校博士点基金项目(20060157003)

摘　　要：以杂草稻wr04-12和栽培稻辽粳294为材料,在大田条件下研究了杂草稻密度对栽培稻生长发育和产量的影响。结果表明:随着杂草稻密度的逐渐增加,栽培稻分蘖数、叶面积指数、叶绿素含量和干物质积累均有不同程度的减少,最终导致栽培稻产量显著降低。从对产量构成因素的影响来看,水稻有效穗数受杂草稻密度的影响最大,穗粒数和结实率受到的影响次之,千粒重受到的影响最小。因此,水稻有效穗数减少和干物质生产能力降低是杂草稻竞争造成栽培稻减产的主要原因。Using weedy rice wr04-12 and cultivated rice Liaojing 294 as materials, the effects of weedy rice density on growth characteristics and yield of cultivated rice were studied in field experiment. The results showed that tiller number, leaf area index, dry matter accumulation and chlorophyll content of cuhivated rice were lower than those of the CK in some degree with the increasing weedy rice density, the significant decrease of yield were induced finally. Considering the yield components, the effect of plant density seemed to be the most significant on the number of rice panicles, the spikelets per panicle and percent of filled-grain were seconded, while the 1000-grain weight did not seem to be influenced. As a whole, the main reason causing yield loss of cultivated rice was the decreasing of the number of panicles and lowing the dry matter accumulation for competition cultivated rice with weedy rice.

关 键 词：杂草稻 密度 栽培稻 生长发育 产量 

分 类 号：S511[农业科学—作物学] Q111.2[生物学—普通生物学]